not so much sampled as just superimposed, or underimposed, with the original track... which up to that point is your standard thuggish-sexist rap but then (as the "kindness of Omni Trio" tender-hearted vibe kicks in) switches to more reflective, even vulnerable tone with "strugglin' to survive" lyric

digging deeper into the album by Tyga, aka the dude responsible for "Rack City", some more Nuumstuff crops up later:

not just that echo-chambered rave siren / foghorn-bleep as heard in countless nuum-trax (most recently on a track on Zomby's nuumological pastiche EP Nothing)